<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>Document</title>
    <script type="text/javascript">
    function math(){
    var sum=0;
    for(var i=10;i<=100;i++){
        sum=sum+i;
     }
    document.getElementById("Result").value=sum;
    }
    
    </script>
</head>
<body>
    <input type="button" value="计算" onclick="math()">
    <input type="text"  id="Result">
</body>
</html>